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Checks first to get key from your .Rprofile file for an API key with the name 'tropicoskey'. If it is not found, the default key is used.
getkey(x = NULL, service)
An API key, defaults to NULL.
The API data provider, used to match to default guest key.
# NOT RUN { getkey(service="tropicos") getkey(service="eol") # }
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